interface SpeakHello {
	void speak();
}
class HelloMachine {
	public void turnOn(SpeakHello hello) {
		hello.speak();
	}
}
public class EX7_3 {
	public static void main (String args[]) {
		HelloMachine machine = new HelloMachine();
		machine.turnOn(new SpeakHello() {
			public void speak() {
				System.out.println("hello,you are weclome!");
			}
		}
	);
	machine.turnOn(new SpeakHello() {
		public void speak() {
			System.out.println("你好，欢迎光临！");
		}
	}
	);
}
}
